Method RunPostFxPass

Source/Engine/Renderer/RenderList.cpp:360–447

}

void RenderList::RunPostFxPass(GPUContext* context, RenderContext& renderContext, MaterialPostFxLocation locationA, PostProcessEffectLocation locationB, GPUTexture*& inputOutput)
{
    // Note: during this stage engine is using additive rendering to the light buffer (given as inputOutput parameter).
    // Materials PostFx and Custom PostFx prefer sampling the input texture while rendering to the output.
    // So we need to allocate a temporary render target (or reuse from cache) and use it as a ping pong buffer.

    bool skipPass = true;
    bool needTempTarget = true;
    for (int32 i = 0; i < Settings.PostFxMaterials.Materials.Count(); i++)
    {
        const auto material = Settings.PostFxMaterials.Materials[i].Get();
        if (material && material->IsReady() && material->IsPostFx() && material->GetInfo().PostFxLocation == locationA)
        {
            skipPass = false;
            needTempTarget = true;
        }
    }
    if (EnumHasAnyFlags(renderContext.View.Flags, ViewFlags::CustomPostProcess))
    {
        for (const PostProcessEffect* fx : renderContext.List->PostFx)
        {
            if (fx->Location == locationB)
            {
                skipPass = false;
                needTempTarget |= !fx->UseSingleTarget;
            }
        }
    }
    if (skipPass)
        return;

    auto tempDesc = inputOutput->GetDescription();
    auto temp = needTempTarget ? RenderTargetPool::Get(tempDesc) : nullptr;
    if (needTempTarget)
    {
        RENDER_TARGET_POOL_SET_NAME(temp, "RenderList.RunPostFxPassTemp");
    }

    auto input = inputOutput;
    auto output = temp;

    context->ResetRenderTarget();

    MaterialBase::BindParameters bindParams(context, renderContext);
    for (int32 i = 0; i < Settings.PostFxMaterials.Materials.Count(); i++)
    {
        auto material = Settings.PostFxMaterials.Materials[i].Get();
        if (material && material->IsReady() && material->IsPostFx() && material->GetInfo().PostFxLocation == locationA)
        {
            context->ResetSR();
            ASSERT(needTempTarget);
            context->SetRenderTarget(*output);
            bindParams.Input = *input;
            material->Bind(bindParams);
            context->DrawFullscreenTriangle();
            context->ResetRenderTarget();
            Swap(output, input);
        }